Plaster anchor



Patented July 7, 1931 UNITED STATES ISAAC A. BAUM, F CHICAGO, ILLINOISPLASTER ANCHOR Application led September 6, 1929. Serial No. 390,760.

some means be provided for adequately and certainly anchoring plaster tothe metal surfaces. This is made necessary by the fact th at the plasterdoes not adhere firmly to, metal surfaces and by the fact thatrth'evibration and jars incident to the closing of doors tends to causecracks and loosening of the plaster at its junction with the frameunless some adequate anchoring means is provided.

Preferably means should be provided that will permit the plaster toproject through the metal frame into contact with the surface of thewall. If the wall is composed of tile or brick, the adherence of theplaster thereto will form a bond or anchor although it will provide noadequate anchoring means directly to the frame. In the bowed stripanchor disclosed in my prior application above Y identified, asatisfactory anchoris provided but some difficulty is experienced whereworkmen do not trowel the plaster sufficiently to insure a flow of theplaster beneath the' loo Iii the construction here disclosed this difficulty is avoided and manufacturing is made equally simple. A directopening from the plaster space is provided to the face of the wall andthe angular position of the strip insures an adequate anchor oftheplaster to the metal part. I f Y The invention will be more readilyunderstood by reference to the accompanying drawing in which the figureisa perspective lview of a portion of awall to whichla frame having myimproved anchor has been applied. In the drawing, a frame is shown as ofgenerally channel shape having a web 10 constituting a j amb and sideflanges 11 that lie alongside of ka tile wall 12. A plaster ter- 50mjnal strip having a base 13 isl welded to a tion.

plaster space to permit plaster to enter and to contact with the wall. f

side flange, the perpendicular portion 14 with its rebent margin 15constituting a plaster finish member. yIn the flanges 11, I strike outpairs of tongues 16'-17, the tongues remaining attached' to the metalalong their longitudinal dimension and being inclined inwardly towardeach other. By this construction the space between the tonguesv isdirectly open to the plaster space and plaster f will readily enter thespace and contact with the face of the tile.

As a means for anchoring the frame into the wall I providewire members18 having hooks19 on their ends adapted toy enter the openings formed bystriking out the tongues.

Although I prefer to construct the anchoring tongues in pairs as shown,it will be apparent that single tongues will function in a similarmanner, the tongues at any case preferably partly overlying the openingsformed by striking them out. y It is apparent also that the tongues maybe arranged transversely instead yof longitudinally, the arf rangementshown being preferred as the tongues serve to stiifen the frame ratherthan weaken it.

These and other modifications are considered to be within the spirit ofmy inven- I claim: 80

1. In a frame for wall openings, the combination of a metal memberYhaving portions .Y adaptedy to lie alongside of the-wallv and toreceive plaster thereon, and flat strips struck out of the metalportions and projecting in a line other than perpendicular to the planeof the portions, the space formed by striking out the strips beingdirectly open to the y 9o 2. In a frame for wall openings, thecombination of a metal member having portions adapted to lie alongsideof the wall and to receiveplaster thereon, and strips struck out fromthemetal portions, the strips being attached to the'metal along their longdimension and being inclined to partly overlie the openingy formed bystriking them out.

3. In means for framing wall openings, the combination of a channelshaped frame member the flanges of Which overlie a Wall, and pairs oftongues struck out of the flanges, the tongues of each pair beinginclined toward each other Without meeting, t0 leave a 5 direct openingfrom the plaster space to the Wall beneath.

In testimony Whereoil I have aiXed my signature.

ISAAC A. BAUM.

